#include <iostream>
#include <iomanip>
#include <fstream>
#include <stdio.h>
#include <math.h>

using namespace std;

int main()
{
	double pi_float  = (float) 3.141592;
	double pi_double = (double) 3.14159265358979;
	
	cout << endl;
	cout.precision(7);	
	cout << "pi float: " << pi_float << endl;
	cout.precision(15);
	cout << "pi double: " << pi_double << endl;
	
    return 0;
}
